[ARM] Make IRQ probing more reliable; ensure that IRQ edge detection

is set correctly.  Remove couple of debugging printk()s.

arch/arm/kernel/irq.c

@@ -633,6 +633,8 @@ unsigned long probe_irq_on(void)
 
 		irq_desc[i].probing = 1;
 		irq_desc[i].triggered = 0;
+		if (irq_desc[i].chip->type)
+			irq_desc[i].chip->type(i, IRQT_PROBE);
 		irq_desc[i].chip->unmask(i);
 		irqs += 1;
 	}

arch/arm/mach-sa1100/irq.c

@@ -55,6 +55,12 @@ static int sa1100_gpio_type(unsigned int irq, unsigned int type)
 	else
 		mask = GPIO11_27_MASK(irq);
 
+	if (type == IRQT_PROBE) {
+		if ((GPIO_IRQ_rising_edge | GPIO_IRQ_falling_edge) & mask)
+			return 0;
+		type == __IRQT_RISEDGE | __IRQT_FALEDGE;
+	}
+
 	if (type & __IRQT_RISEDGE) {
 		GPIO_IRQ_rising_edge |= mask;
 	} else

arch/arm/mach-sa1100/sa1111.c

@@ -117,11 +117,12 @@ static int sa1111_type_lowirq(unsigned int irq, unsigned int flags)
 {
 	unsigned int mask = SA1111_IRQMASK_LO(irq);
 
+	if (flags == IRQT_PROBE)
+		return 0;
+
 	if ((!(flags & __IRQT_RISEDGE) ^ !(flags & __IRQT_FALEDGE)) == 0)
 		return -EINVAL;
 
-	printk("IRQ%d: %s edge\n", irq, flags & __IRQT_RISEDGE ? "rising" : "falling");
-
 	if (flags & __IRQT_RISEDGE)
 		INTPOL0 &= ~mask;
 	else
@@ -181,11 +182,12 @@ static int sa1111_type_highirq(unsigned int irq, unsigned int flags)
 {
 	unsigned int mask = SA1111_IRQMASK_HI(irq);
 
+	if (flags == IRQT_PROBE)
+		return 0;
+
 	if ((!(flags & __IRQT_RISEDGE) ^ !(flags & __IRQT_FALEDGE)) == 0)
 		return -EINVAL;
 
-	printk("IRQ%d: %s edge\n", irq, flags & __IRQT_RISEDGE ? "rising" : "falling");
-
 	if (flags & __IRQT_RISEDGE)
 		INTPOL1 &= ~mask;
 	else